Operation vehicle

A technology for working vehicles and continuously variable speed change devices, which is applied in the fields of agriculture, vehicle parts, agricultural machinery and implements to achieve good detection accuracy, maintain detection accuracy, and maintain speed change accuracy.
CN1676395AInactive Publication Date: 2005-10-05KUBOTA LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
KUBOTA LTD
Publication Date
2005-10-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides an operation vehicle comprising left and right running gears (1R, 1L), an engine (3), a continuously variable transmission device (7) for straight running and a continuously variable transmission device (8) for turning, a speed command means (14), a turning command means (56), wherein the operation vehicle is also provided with a speed detection means and control unit (H). When the command of the turning command means (56) is switched from turning to straight running, the continuously variable transmission device for straight running performs the shift operation, based on the command speed of the speed command means (14) and the continuously variable transmission device for turning performs the shift operation using control unit (H), so that the two continuously variable transmission device have the same speed, and the shift operation speed of the transmission device for turning at that time is made greater than the shift operation speed of the transmission device for straight running on the basis of a speed command means.
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Description

technical field

[0001] The present invention relates to work vehicles. More specifically, it relates to a technology for improving the straight running and turning operability of agricultural working machines including harvesting working machines (combines and the like). technical background

[0002] The prior art of this type of working vehicle, for example, has been disclosed on Japanese Patent No. 3174515 (or with reference to the publications corresponding to it: JP-A-10-157650, KR-A-1998-63749 or CN-A- 1191816). In this existing structure, there are a speed command mechanism, a turning command mechanism, a connecting rod connecting the two command mechanisms, a straight-going continuously variable transmission device and a turning continuously variable transmission device with a mechanically operated link connecting mechanism. When the turning command mechanism issues a straight-going command, the straight-going continuously variable transmission device shifts to the ...

Claims

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